Sondico Long Sleeved Core Base Layer Junior The Junior Sondico Long Sleeved Core Base Layer Top offers a compression fit coupled with an elastic hem for a secure, comfortable fit while training or during a match. This base layer top also features Optivent technology for breathability and is complete with Sondico branding to the chest and back. > Kids base layer top > Long sleeves > Optivent technology > Mesh panels > Flat lock seams > Sondico branding > Keep away from fire > 92% Polyester, 8% elastane > Machine washable.